What is Rand's opinion of altruism as noted in the book, The Virtue of Selfishness?

Rand despises altruism in all forms throughout this book, and views it as the enemy of individualism. Altruism is the principle of acting for the benefit of others over oneself even if benefiting the collective impedes the success and survival of the individual. Rand believes altruism to be contradictory to the natural existence of individual humans, and thus is irrational and immoral.